Speed-governor for dynamos.



N0. 858,002. PATBNTED JUNE 25, 1907.

E. B. JAOOBSON.

SPEED GOVERNOR FOR DYNAMOS.

APPLIOATION FILED JAN. 18, 1904.

2 SHEETSSHBET 1.

Witnesses: Inventor.-

QZ/p'w a w W o harneys.

PATENTED JUNE 25, 1907.

E. B. JAGOBSON.

SPEED GOVERNOR FOR DYNAMOS.

APPLIOATION FILED JAN. 18, 1904 2 SHEETS-SHEET 2.

Q QASOJLK QA? 6-602 neya.

Witnesses.-

UNITED STATES PATENT OFFICE.

EDWARD B JACOBSONOF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO PITTSFIELD SPARK COIL COMPANY, OF PITTSFIELD, MASSACHUSE'TS, A CORPORATION OF MASSACHUSETTS. i

SPEED-GOVERNOR FOR DYNAMOS- N 0. 858,002. Specification of Letters Patent.

Patented June 25, 1907.

A nma filed January 18,1904. Serial No. 189,438;

1'0 (all whom, it may concern:

wheel of an engine in connection with which Be it known that 1, EDWARD B. J ACOBSON the dynamo is used. For the purpose of gov- 5 a citizen of the United States, residing at erning the speed of the dynamo, i make pro- Pi'ttsiield, in the county of Berkshire, State vision for varying. the frictional engagement 5 of Massachusetts, have invented a certain of the members orelements of the frictional new and useful improvement in Speed-Govdriving devices with each other. in a drivernors for Dynamos, of which the following ing arrangement comprising friction-wheels, 6 is a specification, reference being had therein as in the drawings, this variation may be clto the accompanying drawings. l'ected by movement of one element or mem- The invention consists in an improved ber of the driving train relative to the other specd-governor arrai'lgement l'or dynamos, thereof. This relative movement in the and, generally speaking, consists in the compresent instance is permitted by mounting 5 bination, withadynamo, and driving devices the dynamo movably, and arranging the therefor, of an electro-magnet deriving its same to gravitate or be pressed in a direction 5 energy from the current that is generated to occasion the interengagement of the memby the dynamo and controlling the action of hers or elements of the driving train, and also the said driving devices to govern the speed to be moved in the reverse direction so as 7 of the dynamo. The said driving devices, thereby to reduce the driving ell'ect or to dispreferably, though not necessarily in all engage the driving surfaces from each other.

cases, are frictional driving devices. Herein, the dynamo is mounted upon a mov- The manner of carrying the invention into able carrier, 7, which is actuated with yielding efleet may be varied without necessarily inforce tending to hold the friction-wheel 5 of 75 volving a departure from the spirit ol the inthe armature shaft in contact with the driver vention. (S. The post or standard 11 of the casing 1 5 In the accompanying drawings 1 have of the dynamo rests upon the said carrier 7 illustrated the best mode in' which i. have and is attached thereto by means of bolts 12. thus far contemplated embodying the inven- The mode and means of supportil'ig the 39 3 in the drawings d igure 1 shows in do mounted, as at 71, upon a base 8, which latvation a dynamo and driving devices thereter in practice is secured to asuitahle support, for, and illustrates the said embodiment of not shown. A spring for actuating the car- 5 the invention. Fig. 2 shows the same partly rier is represented at 9, it being iorn'ied with in section. Fig. 3 is a detii view in plan onposite coils which are mounted upon a 'showing chiefly the means whereby the ted supporting-rml or spindle it), the oppodriven friction-wheei which is c nnected site extremities of the spring being engaged with the dynamo is pressed in o driving enwith the said rod or spindle as at lot), 100, so 9 gagement with the driving iriction-wheel. that the rod or spindle constitutes a .iixed Figs. 4 and 5 are diagrams showing the elesabutment from which the spring reacts.

4 trical connections to which reference is made For the purpose of transmitting the force oi hereinafter. t a spring to the carrier, an intermediate porre'ierence to the drawings,at i is tion or loop Eli ol" the spring 9 engages with a 95 represented the casing of the dynamo. The wing or arm 13, which latter is mounted dynamo itself may be of any approved conloosely upon the rod or spindle 10 with castruction. In Fig. 2, 2,.2, are the held eoiis pacity to turn around the same. Bythe thereof, 3, 3, the pole-pieces, the armature, tension of the spring, the free extremity of and 41 the armature shaft. the said wing or arm is pressed upwardly The preferred arrangement of hietionai against the underside of the carrier 7 The driving devices for the armature shatteil comforce which is transmitted through the wing 5 prises a friction-wheel 5 that is fast upon the or arm acts with a tendency to move the said same, and a driver (3 in the [orm of a frictioncarrier and the dynamo which. is mounted wheel engagingwith the said l'riction-wheelS. thereon in a direction to press the wheel 5 3 tion, and I will explain the latter with reference to the illustrated embodiment.

The driving friction-wheel 6 may be the flycarrier 7 may vary in practice. although not necessarilv, it is pivotally against the wheel 6.

Preferably,

Any suitable provision a proper degree thereof.

may be made for enabling the tension of the spring 9 to be adjusted so as to secure the This adjustment in in the present instance is effected by turning projecting ends of a pin 142 which is applied to the rod or spindle,.whereby the sleeve is permitted to move lengthwise of the rod or spindle but prevented from turning relative thereto. The rod or spindle 10 is shown provided with a cross-pin 101 serving as a handle for convenience in turning the same in making adjustment of the tensionof the spring.

At 16 is shown a vertical post rising from the base 8 and receiving upon its screwthreaded upper portion a nut 161 adapted to serve as a stop by which the movement of the carrier and dynamo under the influence of the spring 9 may be limited in extent. A check-nut 162 is also applied to the said post inconnection with the stop-nut 16 Whenever it is desired for the time being to hold the wheel 5 out of driving relations with the wheel 6, this may be effected by turning down the nuts 161, 162, to a suitable extent.

With the dynamo and its movable carrier I combine an electro-magnet which, as before stated, derives its energy from the current that is generated by the dynamo, and which is connected and combined to act in opposition to the force by which the elements or members of the driving train are placed. in driving engagement with each other, so as by controlling the driving engagement of the said elements or members to govern the speed of the dynamo. In the present instance, I coil 17. he core of this coil has at its upper end an enlargement or flange 171 which is in metallic and magnetic contact with the casing 1. This contact is secured in the presentinstance b causing the said flange to fit tightly wit 'n-the opening in the base of the casing which it occupies. The core is secured in place within the casing by means of a pin or pins 0., Fig. 2, inserted through a hole or holes in the casing 1 andentering the pe: riphery of the said enlargement of flange 171. The upper portion of the length of the coil and its core-piece are contained and inclosed within the post or standard 11 of the case 1. The lower portion ofthe post or standard 11 is in metallic and magnetic contact with the carrier 7. The lower end of the core constilace below the dynamo a woundtutes one pole of an electro-magnet, and the carrier 7 constitutes the opposite pole, these two poles being yoked together by means of the post or standard. The carrier 7 is formed with an opening 7 2 through which the lower end of the coil 17 and its core-piece extend. As will be obvious from Fig. 2, the arrangement forms practically an iron-clad magnet. The base 8 constitutes the armature for the said magnet. In orderto enable a larger number of ampere turns to be employed in the coil 17 than otherwise would be possible with a post or standard 11 of the height which is shown in the present drawings, the base or armature 8 is chambered out opposite and to receive the lower ends of the coil 17 and its pole-piece. This enables the core-piece to be made longer and thereby to receive more turns of wire than would be possible if the portion of the base which is immediately below thecoil were i'lush with the remainder of the base. The electromagnet is contained in circuit with the dynamo. Thus, it may be embraced either in a shunt circuit 177 as indicated in the Iiagram at Fig 4, or in series with the field and armature as indicated in the diagram at Fig. 5. In Figs. 4 and 5 the commutator of the dynamo is indicated at 412.

In operation, the current that is generated by the rotation of the armature through the action of the driving train will energize the magnet, which latter will act with a tendency to separate the friction-wheels,'in opposition to the force by which the said friction-wheels are held in driving engagement with each other. When the speed of the dynamo rises so that the increased intensity of the current becomes, suflicient to render the magnet powerful enough to overcome the said force, the pressure of the friction-wheels against each other will be lessened so as to reduce the frictional engagement thereof, or the said wheels will be separated, until, by slowing down of the dynamo, the current from the latter becomes so reduced in intensity as to reduce the energy of the magnet below the tension of the spring 9, whereupon the said spring will be permitted to act to press the friction-wheels together again. In this manner the driving and speed of the dynamo will be governed.

What I claim is:--

1. The combination with a movablymounted dynamo, and driving devices controlled by the position of the dynamo to regulate the speed vof the latter, of an electromagnet acting to vary the position of the dy", namo in accordance with variations in the intensity of the current generated thereby.

2. The combination with a dynamo, and a driving-train therefor comprising africtionwheel connected therewith and a driverwheel with which the periphery of the said friction-wheel makes driving-contact, of an ion 30 met electromagnet deriving its energy from the.

an .eleetro-magnet acting to regulate the speed that is imparted to the dynamo, by varying the position of the dynamo 1n accordance with variations in the intensity of the current generated thereby.

4. In combination, a movably-mounted dynamo, an electromiagnet movable with the dynamo and" deriving its energy from the current generated by the dynamo, a fixed magnet-armature, a rotating driver, and a driven-wheel connected with the dynamo and controlled as to its driving relations with the driver by the position of the dynamo.

5-. In combination a movabl .mounted dynamo, a driver, a wheel connected with the said dynamo, means to hold the said wheel and driver yieldingly in engagement with each other, and an eleotro-magnet deriving its energy from the current generated by the dynamo and serving to control the position of the, dynamo, whereby the speed of the dynamo is governed. s

6. In combination, a dynamo having a stand, a movable carrier constituting with said stand one pole of an electro-Inagnet, a wound core applied to the stand and providing the other pole of the said electro-magnet, a relativelyiixed magnet-armature, a driver, and a wheel connected with the dynamo and controlled as to its driving relations with the driver by the position of the dynamo and carrier, whereby the speed of the dynamo is governed.

7'. In combination, a dynamo, a carrier for the said dynamo having in connection therewith one pole of an electro-magnet, a wound core constituting the op ositepole of the eleetro-magnet, the said e ectro-magnet deriving its energy from the current generated by the dynamo, a base having in connection therewith an .rmature for the said electro-magnet, and having the said carrier pivotally connected therewith, a driver, and

a driven-wheel connected with the dynamo and controlled as to its driving relations with the driver by the positionof the dynamo and carrier, whereby the speed of the dynamo is controlled.

8. In combination, a dynamo, a stand for the said dynamo, a carrier with which said stand is connected, the said carrier constituting or having in connection therewith one pole of an electro-magnet, and having an opening theretluough, a wound core in magnetio connection with the said stand and projecting at one end through the-opening in the carrier, a base with which said carrier is movably connected, the said base having in connection therewith a fixed magnet-armature, a driver, and a driven-wheel connected with the dynamo and controlled as to its driving relations with the driver by the position of the dynamo and carrier, whereby the speed of the dynamo is controlled.

9. The combination of a suitable support, an electric generator movably mounted upon said support and provided with a pulley by which it may be driven, means for yielding by urging said generator upon the support in one direction, an clectro-magnet deriving its energizing current from said generator, and means arranged within the range of said magnet for moving said generator in opposition to said yielding means. i

10. The combination of a suitable support, an electric generator movably mounted thereon and provided with an element by which it may be driven, means for yieldingly urging the generator in one direction upon its support, an electro-magnet deriving its energizing current from the generator, and means afiected by' the electro-magnet for acting upon the generator in opposition to the aforesaid yielding means.

In testimony whereof I ailiX my signature in presence of two witnesses.

EDWARD B. J ACOBSON l/Vitnesses:

EDWARD 'I. SoULLY, LAznnAs SIMON.

It is hereby certified that in Letters Patent No.- 858,002, granted June 25, 1907 upon the application of Edward B; Jacobson, of Pittsfield, Massachusetts, for an improvement in Speed-Governors for Dynamos, an error occurs in the printed specification requiring correction, as follows: In line 77, page 3, the words yielding by should read yieldingly; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 30th day of July, A. D., 1907.

[SEAL] o. o. BILLINGS,

Acting Commissioner of Patents. 

